<!--
html文件必须在templates目录下
/application.py
/templates
    /demo.html
    -->
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8"/>
    <meta http-equiv="X-UA-Compatible" content="IE=edge"/>
    <meta name="viewport" content="width=device-width, initial-scale=1.0"/>
    <title>Hogwarts</title>
</head>
<body>
    <h1>霍格沃兹测试开发</h1>
</body>
</html>